Pump-governor.



No. 62a,|or. Patentod luly 4, I899.

B. n. LEWIS & .1. SCHWARTZ.

PUMP GOVERNOR.

(Application flled Jan. 29, 1898.)

3 Sheets-Sheat I,

(No Model.)

(No Model.)

B.v R.

Patented luly'4, I899. LEWIS &. J. SCHWARTZ.

' PUMP GOVERNOR.

(Application filed Jan. 29, 189B.)

3'Sheat-sSheet 2.

----No. s-2a,|o|. PatentedJulyA, 1899.

B. n. LEWIS & J. SCHWARTZ.

PUMP GOVERNOR.

(Application filed Jan. 29, 1898.) (No Model.) 3 Sheets-Sheet 3.

- UNITED STATES,

PATENT OFFIC BENNETT R. LEWIS AND JOHN SCHWARTZ, OF RHINELANDER,XVISOONSIN.

PUMP-GOVERNOR.

SPECIFICATION forming part of LettersPatent No. 628,101, dated July' 4,1899. Application filed January 29, 1828. Serial No. 668,392. (Nomodel.)

T0 (all whom it may concern:

Be it known that we, BENNETT R. LEWIs and JOHN SCHWARTZ, of Rhinelander,in the county of Oneida and State of .Wisconsin, have invented a new anduseful Improvement in Pump-Governors, of which the following is adescription, reference being had to the accompanying drawings, which area part of this specification.

Our invention has relation to improvements in pump-governors. It relatesmore particularly to the class of governors which are connected to apumping-engine and water-main and adapted for automatically controllingthe operation of the engine by the varying waterpressure, being moreespecially intended for use in connection witha water-supply system fora city, town, village, factory, or other large establishment orinstitution.

The primary object had in view is to provide a construction whereby auniform speed of the pump may be obtained notwithstanding the variationsin the Water-pressu re,which is accomplished by admitting more steam tothe pump as the water-pressure increases and, vice versa, by limitingthe amount of steam to the pump as the water-pressure decreases, incontradistinction to constructions wherein the amount of steam admittedto the pump is decreased as the water-pressure increases and, viceversa, the amount of steam admitted to the pump increased as thewater-pressure is decreased.

With the above primary and other incidental objects in View theinvention consists of the devices and parts or their equivalents, ashereinafter more fully set forth.

In the accompanying drawings, Figure 1 is a vertical sectional view ofone form of the device, the mechanism for regulating the water-pressureagainst the piston 23 being omitted. Figs. 2, 3, and 4, respectively,are similar views of modified forms. Fig. 5 is a vertical sectional viewof a form substantially similar to the Fig. 1 form, but in whichmechanism for regulating the water -pressure against the piston of themain water-cylinder is'included. Fig. 6 is a cross-section through thewater-valve mechanism of Fig. 5.

Referring particularly to the Fig. lform of construction, the numeral 7indicates a valvecasing having an inlet-passage 8 for the admission ofsteam or other actuating medium into the casing and an outlet-passage 9for the outflow of the actuating medium from the valve-casing into thesteam-cylinder of an ordinary form of pump. (Not shown.) The inner endof the inlet-passage, which extends into the valve-casing, is providedin its upper and lower portionswith valve-openings 1O 10, which arecontrolled, respectively, by valves 11 11', which valves are mounted ona common valve-stem 12. This valve-stem extends through the top of thevalve-casing and advisably through a stuffing-box 13. Extending upwardlyfrom the top of the valvecasing and preferably integral therewith is aframe 14. The back piece of this frame is provided with an elongatedslot 15, in which slot a lever 16 is pivoted on-a pivot-pin 17. The longarm of this lever is provided medially with an elongated slot 18, andinto this slot passes a pivot pin or stud 19 from the:

valve-stem. Mounted on the long arm of the 'lever between this pivot pinor stud and the end of said long arm is a weight 20, which is providedwith an upwardly-extending yoked 'portion through which the leverpasses. A set-screw 21 extends through the upper end of the yoke andimpinges against the lever, so that the weight may be held in adjustedpositionpn the lever at points closer to or farther from the pivot pinor stud 19. Secured to the face of the back piece of the frame is awater-cylinder 22, in which a piston 23 is adapted to reciprocate. Thestem 24: of this piston passes downwardly through the lower end of thecylinder and has projecting from a medial point thereof a pin or stud25, which extends into an elongated slot 26 in the end of the short armof the lever 16. The lower end of the piston-stem 24 is guided in an eyeformed at the outer end of a projecting arm 27. Extending into the topof the cylinder 22, above the piston 23, isapipe 28, which leads fromthe reservoir orother suitable source of water-supply in the system.

In the operation of the Fig. 1 construction when an excess Waterpressureoccurs, the piston 23 will be caused to descend, and this through thedescribed connection will turn the lever 16 on its pivot 17, so as tothrow. the long arm of said lever upwardly. This upward throw will,through the valve-stem 12, raise the valves 11 11 away from theirvalve-seats. The lower the piston 22 is forced downwardly the higher thevalves will be raised, and consequently more steam admitted. The steamthus admitted into the casing passes through the outletpassage 9 andenters the steam-cylinder of the pump, so as to act on the pistontherein and cause a reciprocation of the piston of the pump. The weightis of course adjusted on the long arm of the lever, so as tocounterbalance the water-pressure on the piston 23 after said piston hasbeen moved downwardly a certain distance, thereby keeping the pumprunning at a certain number of strokes in accordance with a certaindegree of water-pressure. Of course when the water-pressure on the topof the piston 23 decreases the weight will cause the long arm of theleverto move downwardly, and thereby depress the valve-stem 12 and raisethe piston 23. The depression of the valve-stem 12 will cause the valves11 11' to move toward their seats, thereby diminishing the area of thevalve-openings, and consequently limiting the amount of steam admittedto the steam-cylinder of the pump. It follows from the operationdescribed that with increased water-pressure the amount of steamadmitted to the pump is increased and that with decreased water-pressurethe amount of steam admittedto the pump is decreased. This is animprovement over existing constructions,in which the very reverseoperation takes place-1 hat is to say, in such constructions withincreased water-pressure the amount of steam admitted to the pump isdecreased, and, vice versa, with decreased water-pressu re the amount ofsteam admitted to the pump is increased. On this account these existingsystems are open to serious objections, which our invention overcomes.For instance, when there is decreased waterpressnre of course thepressure of the water against the piston in the water-cylinder of thepump is lessened, and inasmuch as in such existing systems the amount ofsteam admitted to the steam-cylinderof the pump at this time isincreased, the pump is not only caused to reciprocate more rapidly bythe increased steam-pressure, but also by the diminished resistanceoffered by the water, resulting frequently in the pump running away, soto speak, and also resulting in an unnecessary expenditure and loss ofsteam. In our device the moment the water-pressure is diminished thereis consequently less resistance offered by the water against the pistonin the water-cylinder of the pump, and it is at this time that lesssteam is required to work the pump. \Ve therefore diminish thesteam-supply and effect a saving of steam when it is necessary only touse a small quantity, while, on the other hand, when the water-pressureis increased and there is a greater resistance against the piston of thewatercylinder of the pump we admit more steam, thereby only utilizing anaugmented quantity of steam at the time when it is absolutely necessarythat such increased quantity should be used. By this means the pump maybe made to run at a uniform rate of speed notwithstanding variations inthe pressure of the Water. By the employment of the weight on the leverthe desired speed of the pump can be regulated. By moving the weightnearer the pivot 18 said weight gives less resistance to thewater-pressure, and consequently the valves are opened wider to admitmore steam, and by moving the weight farther away from the pivot 18 saidweight otfers more resistance to the water-pressure, and consequentlythe valves are not open so wide and less steam is admitted to the pump.

In order to prevent the valves from closing entirely, so as to shut offsteam to the pump, and, on the other hand, to prevent the valves fromopening beyond a certain point, we mount on the valve-stem 12 adjustablecollars 29 29. Extending from the frame 14 is an arm 30, which isprovided at its outer end with an eye through which the valve-stem 12passes. This eyed portion not only forms a guide for the valve-stem inits movement,

but inasmuch as it is located between the two collars 29 29 it forms acontact with which said collars come into engagement. As the stem movesdownwardly it is obvious that the collar 29 will contact with the arm 30and preventthe complete closing of the valves, and as said valve-stemmoves upwardly the collar 29 will cont-act with the arm 30, and therebylimit the extent to which the valves can be opened.

Referring now to the Fig. 2 form of construction, this shows avalve-casing 7, having an inlet-passage 8 and an outlet-passage 9. Inthis casing but a single valve 11 is em ployed,w hich regulates theoutlet 9. Secured to or forming a part of the top of the valve-casing isa frame 14. To an intermediate cross-bar of this frame is pivotedmedially a lever 31, provided at oppositeends with elongated slots 32and 33, respectively. Into the slot 32 extends the pin or stud 13 of thevalve-stem 12 The upper end of the valvestem passes through a bearing34, formed in the top portion of the frame 149, and above and below thisbearing are set the adjustable collars 29. The water-cylinder 22 ismounted on the top piece of the frame 14, and the piston-stem 24: of thepiston 23 is provided at its lower end with a projecting pin or stud 25.Pivoted to a cross-bar of the frame 14 on a pivot-pin 35 is a lever 36,the short arm of said lever being provided medially with an elongatedslot 37, which is engaged by the projecting pin 25 of the stem 24. Theend of this short arm of the lever 36 is provided with a projecting pinor stud 38, which engages the elongated slot 33 of lever 31. The longarm of lever 36 has mounted thereon adjustably a weight 20. This weightis provided with a yoke portion which is adapted to be engaged with anyof a series of notches in the upper edge of the lever, whereby theweight is held to adjusted position. In operation this form of deviceworks substantially similar to the form shown in Fig. 1, although itinvolves a compound lever mechanism. It is obvious that as the piston 23moves down wardly it will act on the short arm of the lever 36, so as tothrow the long arm of saidlever upwardly against the action of theweight, and at the same time the arm of the lever 31 which is engaged bythe short arm of the lever 36 is turned so as to throw the other arm ofsaid lever 31 upwardly, and thereby raise the valve farther away fromits seat in order to permit of an increased quantity of steam passinginto the steam-cylinder of the pump. When the water-pressure decreases,it is obvious that a reverse operation will take place. In the Fig. 3vconstruction a slightly-varied form of valve-casing is employed in whichthe valve-opening is closed on the up movement of the valve stem insteadof being opened, as in the preceding forms of construction. In this Fig.3 modification also the valve-stem serves as the piston-stem for thepiston in the water-cylinder. The valvecasing of Fig. 3 is indicated by7 the valve by 11*, the combined valvestem and pistonstem by 12 theframe mounted above the valve-casing by 14, the water-cylinder by 22 thepiston therein by 23", the pipe entering the cylinder by 28", and thelever by 16. The lever 16" is pivoted intermediate of its ends to one ofthe side pieces of the frame 14 and the short arm of this lever isprovided with an elongated slot which is engaged bythe projecting pin orstud 18 of the combined valve-stem and piston-stem. The long arm of thelever carries thereon the adjustable weight 20". The contact-collars onthe valvestem 12 in this form of construction are indicated by thenumerals 29 29".

In the operation of the Fig. 3 form of construction, when there isexcess water-pressure the piston 23 is causedto descend, and this forcesthe valve 11 downwardly farther away from its'seat, so as to open thevalve-opening leading to the outlet passage, and consequently admittingmore steam to the steamcylinder of the pump. When the water-pressure isdecreased and the weight causes a turning of the lever 16*, so as tothrow its short arm upwardly, the valve is raised toward its seat,thereby diminishing the area of the valve-opening, and consequentlydecreasing the amount of steam passing to the pump.

In the Fig. 4form of construction the valvestem and pisto11=stem arealso in one piece; but in this form water is introduced into the lowerend of the water-cylinder, so as to cause any excess pressure to actagainst the under side of the piston in said cylinder.- This causes anuplifting of the valve, so as to ad- "mit more steam to'the pump. Whenthe water-pressure decreases, the weight causes a tilting of the leverand a'consequent down movement of the valve toward its seat. In thisform it will be noticed that the lever is pivoted at its end to one ofthe side pieces of the frame and that the projecting stud or pin of thevalve-stem enters an elongated slot at a point of the lever intermediateits ends instead of at the end of the lever, as in the Fig. 3 form. Inthis modification (illustrated in Fig. 4) the different parts aredesignated by the same numbers as the corresponding parts are designatedin Fig. 3, excepting that said numbers are followed by the letter 0.

In the form of construction illustrated in Fig. 5 of the drawings, whichconstruction is adapted to be used in conjunction with any of theseveral forms of construction illustrated in the accompanying drawings,we designate the valve-casing by 7, the valve byll the valve-stem by 12the projecting pin or stud of said valve-stem by 18, the stop-collars onthe valve-stems by 29 29, the frame by 144 the water-cylinder by 22, thepiston therein by 23, the piston-stem by 24 the projecting pin or studof said piston-stem by 25 the lever by 16 the adjustable weight thereonby 20 and the pipe leading to the water-cylinder by 28. The lever 16 inthis form of construction is arranged and operates substantially similarto the lever 16 of Fig. 1. In all the forms of construction illustratedmechanism is employed for controlling the strokes of the pump. In theFig. 5 form,

however, we show additional mechanism for controlling the amount ofwater-pressure. This mechanism, however, itwill be obvious, is equallyapplicable to all the other forms of construction shown. To accomplishthis, we provide a supplemental water-cylinder 39, which is incommunication with the pipe 28 by means of a branch pipe 40. Within thecylinder 39 is a piston 41. The piston-stem 42 of this piston extendsupwardly through the top of the cylinder 39 and has projecting from theupper end thereof a pin or stud 43, which engages an elongated slot 44in a lever 45. One end of this lever is pivoted to an arm 46, extendingupwardly from the cylinder 39. This lever carries an adjustable weight47. Within the pipe 28 is arranged a rotatable valve 48, (see Fig. 6,)which is provided with a straight passage 49 and with a diagonal passage50, leading from the straight passage. The outer end of the valve-stein51 has secured theretoa crank 52, and the outer end of this crank isconnected to the lever 45 by means of a link 53. In the operation ofthis water-pressure-regulatin g mechanism if, for instance, the weight47 is so positioned on the lever 45 as to resist an upward pressure of,say, eighty pounds against the under side of the piston 41 the valve 48will be in the position shown in Fig. 6 that is to say, with itsstraight passage 49 in line with the pipe 28 and its diagonal passage 50closed, so that free passage for the water is afforded to the cylinder22. If now the pressure exceeds eighty pounds, then the piston 41 willIIC rise against the resistance of the weight 47 and cause an upliftingof the lever 45 and a consequent turning of the valve 48, so that thestraight passage 49 will be closed against the flow of the water throughthe pipe 28 to cylinder 22, while the diagonal passage will be in linewith a drip or discharge pipe 54. Pressure against the piston 23 willthen cease and the weight 20 will cause a turning of the lever 16 and aconsequent down movement of the valve-stem 12 and an upward movement ofthe piston 23 which will force the water above said cylinder backthrough the pipe 28, thence through a portion of the straight passage 49into the diagonal passage 50 and out through the drip or discharge pipe54. This drip or discharge pipe may be provided with a valve to regulatethe quantity of discharge. The downward movement of the valve-stem 12will cause a closing of the valve 11 to the extent permitted by thestop-collar 29 so as to almost entirely shut off the supply of steam, orwhere the stopcollars are dispensed with to cause an entire shutting offof the steam. The operation described will of course cause a reductionin the water-pressure, and the piston 41 will then be caused to descendby the action of the weight 47, audit will continue to descend until itreaches the position it before occupied, when, of course, the valve 48will have been turned back to its original position to again admit waterinto the cylinder 22, thereby restablishing the water-pressure to theextent to which the weight 47 is adjusted.

In explanation of the particular adaptability of all the forms of ourinvention to use in connection with a citys waterworks it is to bestated that when water is being taken from the system the water-pressureagainst the piston in the water end of the pump is necessarilydecreased. In view of this decrease of the water-pressure it necessarilyfollows that it does not require as great a steam-pressure to keep thepump running at a uniform speed 01' at the same speed as when water isnot being used or when but a small quantity of water is being used.Hence it is that in our invention when the water is being used, and whentherefore the water-pressure against the piston in the water end of thepump is thereby decreased, the quantity of steam admitted to the steamend of the pump is decreased, as at this time it is obvious that lesssteam-pressure is required to preserve the uniform running of the pump,owing to the fact. that there is less waterpressure against the pistonin the water end of the pump. This decrease of the steampressure isautomatically effected by means of the weight acting on the lever, andthereby actuating the valve-rod and causing the valve to limit theamount of steam admitted to the steam end of the pump. Now when thequantity of water being used is diminished of course the water-pressureagainst the piston in the water end of the pump is increased.

It is then necessary that the steam-pressure should be increased inorder to counteract the increased water-pressure and preserve a uniformrunning of the pump. This is automatically eifccted by means of themechanism already clearly described. It is a fact also to be noted thatin a citys waterworks the steam end of the cylinder of the pump islarger than the water end. It therefore follows that when water is beingused not only is less steam required owing to the diminished pressure ofthe water, but also owing to the fact that the piston in the water endof the cylinder of the pump is less in area than the piston in the steamend of the cylinder of the pump. In other systems now in general usewhen the water-pressure decreases the steam-pressure increases, and viceversa. These systems are objectionable, owing to the fact that theincreased steam-pressure frequently causes a running away of the pumpand also a greater consumption of steam than is absolutely necessary.

\Vhile we have shown in all the several forms of our invention anadjustable weight for keeping the pump running at a certain number ofstrokes in accordance with a certain degree of water-pressure, yet we donot wish to be understood as limiting ourselves thereto, as it isobvious that the same result could be obtained by spring-pressure on thelever, with means for adjusting or varying the extent of saidspring-pressure.

What we claim as our invention is- 1. In a governor for pumps, thecombination of a valve-casing provided with a suitable iulet-passage andan outlet-passage, the latter leading to the pump to be operated, avalve within the casing, a cylinder within the circuit of the watersystem, a piston within the cylinder, a rod having one end extendinginto the valve-casing and connected to the valve therein, and having itsopposite end extending in to the cylinder and connected to the pistontherein, and a pivoted lever connected at one point to the rod, and alsocarrying thereon an adjustable weight, the construction adapted, as thewater pressure against the piston increases, to move the valve fartheraway from its seat, to thereby admit an augmented quantity of steam tothe pump, and, vice versa, when the water pressure against the pistondecreases, to cause the valve to be moved closer to its seat, so as toadmit a diminished quantity of steam to the pump.

2. In a governor for pumps, the combination, of a valve-casing providedwith a suit able inlet-passage and with an outlet-passage, the latterleading to the pump to be operated, a valve within the casing adaptedfor controlling thepump-actuating medium, and provided with a projectingvalve-stem, a main cylinder, a valve-controlled water-pipe within thesystem of water-supply and leading to said cylinder, a piston within thecylinder, mechanism between the piston and the stemof the valve forcontrolling said valve, an auxiliary cylinder also within thewater-supply system, a piston within said auxiliary cylinder, and aconnection between the piston of this auxiliary cylinder and the valveof the waterpipe, said connection adapted, after the water-pressureexceeds a certain given pressure, to cause the valve of the water-pipeto be operated so as to shut off the flow of water to the main cylinder,and after the water-pres sure has fallen to the fixed pressure, to openthe water-valve, and permit the water to again flow to the maincylinder.

3. In a governor for pumps, the combination, of a valve-casing providedwith a suitableinlet-passage and with anoutlet-passage, the latterleading to the pump to be operated, a valve within the casing forcontrolling the pump-actuatin g medium, said valve provided with aprojecting stem, a main cylinder, a valve-controlled water-pipe withinthe watersupply system and leading to the main cylincler, a pistonwithin said cylinder and provided with a projecting piston-stem, a leverconnected to the piston-stem and to the valvestem, said lever adapted tomove the valve farther away from its seat to admit an augmented quantityof steam to the pump, when an excess water-pressure occurs, and to movesaid valve closer to its seat to admit a decreased quantity of steam tothe pump, when the water-pressure is decreased, an auxiliary cylinderalso within the water-supply system,

a piston within said auxiliary cylinder, and a connection between saidpiston and the valve of the water-pipe, said connection adapted, afterthe water-pressure exceeds a certain given pressure, to cause the valveof the water-pipe to be operated so as to shut off the fiow'of water tothe main'cylinder, and, after the water-pressure has fallen to the fixedpressure, to open the water-valve and thereby permit the water to againHow to the main cylinder;

4. In a governor for pumps, the combination of a valve-casing providedwith a suitable inlet-passage and anoutlet-passage, the latter leadingto the pump to be operated, a

valve for controlling the pump-actuating medium, said valve providedwith a projecting stem, a main cylinder having a piston therein,

a connection between said piston and the stem of the valve for thepump-actuating medium, a pipe within the water-supply system, said pipeleading to the main cylinder, a valve within said pipe adapted normallyto admit the water to the main cylinder, an auxiliary.

cylinder also within the circuit of the watersupply system, a pistonwithin said cylinder, said piston provided with a projectingstem,

a pivoted lever connected to the piston-stemof the auxiliary cylinder,anadjustable weight on said lever, and a connection between the lever andthe stem of the water-valve,whereby, when the water pressure exceeds acertain fixed pressure, the valve will be operated so

